java going through array field without creating new instance

Question

I'm tring to write a method which get Object and do some logic with the Object's Fields.

My method looks like:

public void exampleCast(Object obj) {
    Field[] fields = obj.getClass().getFields();
    for (Field field : fields) {                    
        if (field.getClass().isArray()) {

        /*
            HOW CAN I GO OVER THE ARRAY FIELDS , WITHOUT CREATING NEW INSATCNE ?
            SOMETHING LIKE:
            for (int i = 0; i < array.length; i++) {
               array[i] ...
            }

        */  
        } else {
            ...
            ...
        }
    }
}   

And example for objects:

class TBD1 {
 public int x;
 public int y;
 public int[] arrInt = new int[10];
 public byte[] arrByte = new byte[10];
}

And call to my method:

TBD1 tbd1 = new TBD1();
exampleCast(tbd1);

In my mehod I dont know how can I get the array values without create new instance (using "newInstance" method) Is it possible ? (please see the comment I wrote in my example)

I read those 2 web sites: http://jroller.com/eyallupu/entry/two_side_notes_about_arrays

http://tutorials.jenkov.com/java-reflection/arrays.html

But didnt get what I want to.

Please help :) Thanks

Answer 1

If I understand your question, you might use java.lang.reflect.Array and something like

if (field.getType().isArray()) { // <-- should be getType(), thx @Pshemo
    Object array = field.get(obj);
    int len = Array.getLength(array);
    for (int i = 0; i < len; i++) {
        Object v = Array.get(array, i);
        System.out.println(v);
    }
} // ...